Abstract

A new linear convex Fresnel lens with its groove side down is described. The design philosophy is similar to that of the highly concentrating two-focal Fresnel lens but includes a correction for chromatic aberration. A solar-concentration ratio as high as 80 is achieved. For wide-acceptance angles, the concentration nears the theoretical maximum.

© 1980 Optical Society of America

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References

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  1. E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
    [CrossRef]
  2. R. Winston, “Light collection within the framework of geometrical optics,” J. Opt. Soc. Am. 60, 245 (1970).
    [CrossRef]
  3. E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Highly concentrating Fresnel lenses”, Appl. Opt. 18, 2688 (1979).
    [CrossRef] [PubMed]

1979 (2)

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
[CrossRef]

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Highly concentrating Fresnel lenses”, Appl. Opt. 18, 2688 (1979).
[CrossRef] [PubMed]

1970 (1)

Friesem, A. A.

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
[CrossRef]

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Highly concentrating Fresnel lenses”, Appl. Opt. 18, 2688 (1979).
[CrossRef] [PubMed]

Kritchman, E. M.

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Highly concentrating Fresnel lenses”, Appl. Opt. 18, 2688 (1979).
[CrossRef] [PubMed]

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
[CrossRef]

Winston, R.

Yekutieli, G.

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
[CrossRef]

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Highly concentrating Fresnel lenses”, Appl. Opt. 18, 2688 (1979).
[CrossRef] [PubMed]

Appl. Opt. (1)

J. Opt. Soc. Am. (1)

Sol. Energy (1)

E. M. Kritchman, A. A. Friesem, G. Yekutieli, “Efficient Fresnel lens for solar concentration”, Sol. Energy 22, 119 (1979).
[CrossRef]

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Figures (6)

Fig. 1
Fig. 1

Transverse cross section of convex Fresnel lens with two grooves magnified.

Fig. 2
Fig. 2

Ray tracing near the focal plane of the three types of lens with θ0 = 0.5°. Red (N = 1.485), average (N = 1.49), and blue (N = 1.495) collimated beams come from the edge θ0 of the acceptance field.

Fig. 3
Fig. 3

The shapes y(x) and groove angles ϕ(x) of the same lenses.

Fig. 4
Fig. 4

The total and marginal efficiencies of the same lenses.

Fig. 5
Fig. 5

The concentration of the same lenses.

Fig. 6
Fig. 6

y(x) and ϕ(x) of the color-corrected design with various θ0.

Tables (1)

Tables Icon

Table 1 f/Number and Geometrical Concentration c of the Color-Corrected Lenses for Various θ0, along with the Ideal Limit cid

Equations (2)

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- F tan θ 0 = x - y ( x ) tan η θ 0 N min ( x )             ( x < 0 ) , - F tan θ 0 = x - y ( x ) tan η θ 0 N max ( x )             ( x 0 ) ,
- F tan θ 0 = x - y ( x ) tan η θ 0 N max ( x ) , F tan θ 0 = x - y ( x ) tan η - θ 0 N min ( x ) ,

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